JP5100503B2 - Sheet bending determination apparatus, cutting apparatus including the same, and sheet bending determination method - Google Patents

Description

  The present invention relates to a sheet bending determination apparatus, a cutting apparatus including the sheet bending determination apparatus, and a sheet bending determination method. More specifically, the present invention relates to a sheet bending determination apparatus and a sheet bending determination apparatus that determine a bending in a width direction of a metal sheet material wound in a roll shape. And a sheet bending determination method in the width direction of such a sheet material.

Conventionally, a shearing machine has been proposed in which a steel strip wound in a roll shape is conveyed by two sets of pinch rolls sandwiching the upper and lower surfaces thereof and sheared into a rectangular steel strip sheet having a predetermined length ( For example, see Patent Document 1). In this shearing machine, when the parallelism between the end surface of the steel strip tip detected just before shearing and the blade surface of the shearing machine is misaligned, or the perpendicularity between the shearing surface and side surface detected from the sheared steel strip sheet is allowed When out of range, change the axial force distribution of the upstream pinch roll of the two sets of pinch rolls, and change the tension generated in the steel strip between the pinch rolls in the width direction (axial direction) Fine adjustment is made so that the transport amount of the steel strip differs in the width direction. As a result, it is possible to suppress meandering of the steel strip, make the end surface of the steel strip tip parallel to the blade surface of the shearing machine, and make the perpendicularity between the sheared surface and the side surface of the sheared steel strip sheet within an allowable range. Yes.
Japanese Patent Application Laid-Open No. 5-116021

  By the way, such a roll-shaped steel strip is rolled into a roll by rolling a steel piece as a raw material to a predetermined thickness when manufactured, but accompanied by a bow-like bending in the width direction when rolled. There is a case. When feeding and shearing such a roll-shaped steel strip, the steel strip is sent in a bent state, so in the above-described shearing machine, the end face of the steel strip tip is sent in parallel to the blade surface of the shearing machine. However, the side of the steel strip cannot be perpendicular to the blade surface of the shearing machine due to the curvature of the side of the steel strip due to bending. For this reason, depending on the degree of bending, the perpendicularity between the shearing surface and the side surface deviates from the allowable range, and the side surface is sheared into a substantially parallelogram having a large deviation in the bending direction. If it becomes so, it cannot use in the process after shearing, and the sheared steel strip sheet will be discarded as a whole, and the yield will be greatly deteriorated. Therefore, in order to suppress the deterioration of the yield due to such bending of the steel strip, it has been required to accurately determine the bending of the steel strip.

  The main object of the sheet bending determination apparatus and the sheet bending determination method of the present invention is to accurately determine the bending in the width direction of a sheet material with a simple configuration. Moreover, a cutting apparatus provided with a sheet | seat bending determination apparatus makes it the main objective to cut | disconnect the cut | disconnected sheet | seat material, without having a shape defect, even when the determined bending is large.

  The sheet bending determination apparatus, the cutting apparatus including the sheet bending determination apparatus, and the sheet bending determination method of the present invention employ the following means in order to achieve the main object described above.

The sheet bending determination device of the present invention is
Feeding means for feeding a metal sheet material wound in a roll shape, cutting means for cutting the sheet material fed at a predetermined length by the feeding means, upstream side and downstream side with respect to the cutting means And a guide means for abutting one side surface of the sheet material at two guide points determined at a predetermined interval and guiding the sheet material in the feed direction with the side surface of the sheet material sandwiched from both sides. , A sheet bending determination device for determining the bending in the width direction of the sheet material,
It is arranged at a position between the two guide points so as to be movable in a direction substantially perpendicular to a reference line connecting the guide points, and is in contact with the side surface of the sheet material at the position and in the width direction of the sheet material Following means for following the displacement;
A relative position detecting means for detecting a relative position of the tracking means with respect to the reference line;
And a bending determination unit that determines a bending in the width direction of the sheet material based on the detected relative position of the following unit.

  In this sheet bending determination device of the present invention, the guide means of the cutting device that guides the sheet material in the feeding direction with the side surfaces of the sheet material from both sides is defined at two locations on the upstream side and the downstream side with respect to the cutting means The guide point is in contact with one side surface of the sheet material and is arranged to be movable in a direction substantially perpendicular to a reference line connecting the guide points to a position between the two guide points. The relative position with respect to the reference line of the tracking means that abuts and follows the displacement in the width direction of the sheet material is detected, and the bending in the width direction of the sheet material is determined based on the detected relative position of the tracking means. As a result, the bending of the sheet material in the width direction can be accurately determined with a simple configuration.

  In such a sheet bending determination device of the present invention, the following unit may be a unit disposed at a substantially central position between the two guide points. By doing so, the bending is determined based on the relative position of the follow-up means at the position where the bending in the width direction of the sheet material becomes larger with respect to the reference line, so that the determination accuracy can be improved.

  Further, in the sheet bending determination device of the present invention, the follow-up means includes a contact portion that contacts a side surface of the sheet material, and a biasing unit that biases the corresponding contact portion toward the side surface of the sheet material. In the initial state before the sheet material is fed by the feeding means, the abutting portion may be urged by the urging means so as to protrude inward from the reference line. By so doing, it is possible to follow the side surface of the sheet material with a simple configuration.

  Furthermore, in the sheet bending determination apparatus of the present invention, the guide means includes a contact portion that contacts the side surface of the sheet material, and a pressing means that presses the contact portion in a direction substantially perpendicular to the feeding direction of the sheet material. Further, the contact portion pressed by the pressing means may be a means provided with a stopper for positioning so as to stop at the guide point. In this way, since the reference line connecting the two guide points becomes constant, the relative position of the follow-up means can be easily detected. Here, the contact portion of the follow-up means and the guide means may be a rotatable roller. If it carries out like this, the wrinkle which generate | occur | produces on the side surface of a sheet | seat material by contact can be prevented.

  In the sheet bending determination apparatus of the present invention, the sheet material may be used for manufacturing a ring of a belt type CVT in which a belt is composed of an element and a ring. In manufacturing a ring used for a belt-type CVT, since the cut surfaces are bent and welded to each other after cutting, the parallelism between the cut surfaces of the cut sheet material and the cut surfaces and the side surfaces Since the perpendicularity is strictly required, the significance of applying the present invention is great.

The cutting device of the present invention comprises:
A cutting device for cutting a metal sheet material wound in a roll,
Feeding means for feeding the sheet material;
Cutting means for cutting the sheet material sent at predetermined lengths by the feeding means;
An upstream guide disposed upstream of the cutting means and abutting against one side surface of the sheet material at a predetermined upstream guide point and guiding the side surface of the sheet material from both sides; and downstream of the cutting means And a downstream guide that abuts on one side surface of the sheet material at a downstream guide point defined at a predetermined distance from the upstream guide point and guides the sheet material from both sides. Means,
A downstream posture correcting means that is arranged downstream of the cutting means and corrects the posture of the sheet material so that the orientation of the side surface of the sheet material on the downstream side approaches the feeding direction;
A sheet bending determination device according to any one of the above-described aspects;
When the sheet bending determination device determines that the bending in the width direction of the sheet material is within an allowable range, the sheet material is fed with a feed amount corresponding to the predetermined length with a guide by the guide means. When normal cutting control for controlling the cutting means to control the feeding means and to cut the fed sheet material is performed, and when the bending in the width direction of the sheet material exceeds an allowable range by the sheet bending determination device When it is determined, the feeding is performed so that the sheet material is fed with a feed amount corresponding to the predetermined length with the guide by the downstream guide of the guide means and the posture correction by the downstream posture correcting means. Control means for controlling the cutting means and controlling the cutting means so as to cut the fed sheet material ,
It is a summary to provide.

  In the cutting apparatus of the present invention, when the sheet bending determination device determines that the bending in the width direction of the sheet material is within the allowable range, the sheet material is fed with a feed amount corresponding to a predetermined length with the guide by the guide means. And the normal cutting control for controlling the cutting means so that the fed sheet material is cut, and the sheet bending determination device determines that the bending in the width direction of the sheet material exceeds the allowable range. Feed amount corresponding to a predetermined length with the correction of the posture by the downstream posture correcting means so that the direction of the side surface of the sheet material on the downstream side is close to the feed direction with the guide by the downstream guide of the guide means The posture correction means and the feeding means are controlled so that the sheet material is fed with the cutting means so that the sent sheet material is cut. Gosuru to perform corrective cut control. Thereby, when the bending in the width direction of the sheet material exceeds the allowable range, the orientation of the sheet material is corrected so that the orientation of the side surface of the sheet material approaches the feeding direction, and the sheet material is cut based on the side surface. The perpendicularity between the side surface and the cut surface is not significantly impaired. As a result, even when the determined bending is large, the cut sheet material can be cut without being defective in shape.

  In such a cutting apparatus of the present invention, the downstream posture correction means is arranged in pairs so as to correct the posture by sandwiching the side surface of the sheet material from both sides between the cutting means and the downstream guide, One of the pair arranged may also serve as the follow-up means. In this way, the posture correcting means and the following means can be arranged in a compact manner.

  Further, in the cutting apparatus of the present invention, provided with an upstream posture correction means that corrects the posture of the sheet material so that the orientation of the side surface of the sheet material on the upstream side is closer to the feed direction than the cutting device, The control means, after executing the correction cutting control, with the guide by the upstream guide among the guide means, and with the correction of the posture by the upstream posture correction means, the truncation length to cut off the end of the sheet material It is a means for controlling the feeding means so that the sheet material is fed with a feeding amount corresponding to the length, and for executing a discarding control for controlling the cutting means so that the fed sheet material is cut. You can also. By doing this, the perpendicularity between the end surface and the side surface of the sheet material is corrected, so that the cut surface cut at the end of the cut sheet material (end surface of the discarded sheet material) and the cut surface cut later It is possible to prevent the parallelism of the deterioration.

The sheet bending determination method of the present invention includes:
Feeding means for feeding a metal sheet material wound in a roll shape, cutting means for cutting the sheet material fed at a predetermined length by the feeding means, upstream side and downstream side with respect to the cutting means The sheet in a cutting apparatus comprising: guide means for abutting on one side surface of the sheet material at two guide points determined at a predetermined interval and guiding the sheet material in the feed direction with the side surface of the sheet material sandwiched from both sides A sheet bending determination method for determining bending in the width direction of a material,
(A) It is arranged at a position between the two guide points so as to be movable in a direction substantially perpendicular to a reference line connecting the guide points, and abuts against the side surface of the sheet material at the position and Detecting the relative position of the tracking means with respect to the reference line using tracking means that follows displacement in the width direction;
(B) A sheet bending determination method including a step of determining a bending in the width direction of the sheet material based on the position detected in the step (a).

  In this sheet bending determination method according to the present invention, the guide means of the cutting device that guides the sheet material in the feeding direction with the side surfaces of the sheet material from both sides is defined at two locations on the upstream side and the downstream side with respect to the cutting means. The guide point is in contact with one side surface of the sheet material and is arranged to be movable in a direction substantially perpendicular to a reference line connecting the guide points to a position between the two guide points. Using the tracking means that abuts and follows the displacement in the width direction of the sheet material, the relative position of the tracking means with respect to the reference line is detected, and the bending of the sheet material in the width direction is detected based on the detected relative position of the tracking means. judge. As a result, the bending of the sheet material in the width direction can be accurately determined with a simple configuration.

  Next, the best mode for carrying out the present invention will be described using examples.

  FIG. 1 is a configuration diagram showing an outline of the configuration of a cutting device 20 equipped with a bending determination device as one embodiment of the present invention, and FIG. 2 is a top view of the cutting device 20 of FIG. FIG. 4 is a cross-sectional view showing an AA cross section of the roll feeder 40 of FIG. 1, and FIG. The cutting device 20 of the embodiment sends out a coil material C in which a metal sheet material used for manufacturing a belt-type CVT ring composed of an element and a ring is wound into a roll shape, for example, at predetermined lengths. It is configured as a device that cuts into two. As shown in FIG. 1, the cutting device 20 includes an uncoiler 30 that feeds the coil material C, a roll feeder 40 that feeds the coil material C that is fed between rolls 43 and 53 that are arranged above and below, and a roll feeder 40. The coil material C fed by the shear 60 that cuts the coil material C by the down-cut method with the cutting blades 62 disposed above and below, and the coil material C that is fed by the guides 72 to 75 disposed on the upstream side of the cutting blade 62 of the shear 60. An upstream guide 70 for guiding the coil material, a downstream guide 80 for guiding the coil material C fed by guides 82 to 85 arranged on the downstream side of the cutting blade 62 of the shear 60, and a power button switch 91 for turning the power on and off. An operation panel 90 composed of various button switches such as a main controller 100 that controls the entire apparatus. Obtain. The bending determination device corresponds to a guide 82, a linear encoder 88 that detects the position of the roller 82b that contacts the coil material C as a component of the guide 82, and the main controller 100.

  As shown in FIG. 1, the uncoiler 30 is connected to a rotating shaft of a stepping motor (not shown) and is expanded so as to contact the inner peripheral surface of the coil material C by a hydraulic cylinder (not shown) to rotate the coil material C. 32 and the outer diameter of the coil material C, which gradually decreases as the coil material C is fed out, is pressed in the radial direction of the coil material C by an air cylinder (not shown) so as to contact the outer peripheral surface of the coil material C. A plurality of presser rolls 34 that rotate with the rotation, and a loop guide 36 that guides the coil material C formed and sent out in a substantially arc shape from below.

  As shown in FIGS. 1 and 3, the roll feeder 40 includes a roll frame 42 that moves up and down so as to draw an arc around a support shaft 42a by driving an air cylinder 41 attached above the frame 40a. An upper roll 43 that is rotatably attached to the frame 42 via a bearing and interlocked with the roll frame 42, a lower roll 53 that is rotatably attached to the main body frame 40a via a bearing, and a lower roll 53 and a coupling 59a. And a stepping motor 59 that rotates and drives the lower roll 53. When the upper roll 43 is positioned at the lower end by driving the air cylinder 41, the upper roll 43 and the lower roll 53 are coiled by the pressing force of the air cylinder 41. When the material C is nipped and fed and the upper roll 43 is positioned at the upper end, To release the holding of the sealing material C. The upper roll 43 includes a shaft 44 in which a spline groove is formed in an axial direction in a substantially central portion, a roll body 45 attached to the shaft 44 through a floating mechanism 46 so as to be slidable in the axial direction, and the shaft 44 in FIG. And a sprocket 48 attached to the right end. Since the lower roll 53 has the same configuration as the upper roll 43, the description thereof is omitted. The description of the floating mechanisms 46 and 56 will be described later. The sprocket 48 and the sprocket 58 mesh when the upper roll 43 is positioned at the lower end by driving the air cylinder 41 to transmit the driving force of the stepping motor 59 to the upper roll 43, and the upper roll 43 is rotated in the rotational direction of the lower roll 53. And can be rotated in the opposite direction. For this reason, when the upper roll 43 is positioned at the lower end, the coil material C can be sandwiched and sent to the shear 60 side. When the upper roll 43 is positioned at the upper end, the meshing between the sprocket 48 and the sprocket 58 is released, and the driving force is not transmitted to the upper roll 43. In addition, the relationship between the rotation amount of the stepping motor 59 and the feed amount of the coil material C by the roll feeder 40 accompanying the rotation is grasped in advance and stored in the ROM 104. A corresponding required rotation amount is output from the main controller 100 to the stepping motor 59 as a drive signal.

  Here, the floating mechanisms 46 and 56 will be described. Since the floating mechanisms 46 and 56 have the same configuration, the floating mechanism 46 will be described, and the description of the floating mechanism 56 will be omitted. The floating mechanism 46 sandwiches the roll body 45 between a plurality of balls 46a disposed in a spline groove formed in the shaft 44, a cylindrical member 46b holding the balls 46a and having the roll body 45 fixed to the outer periphery thereof, and the roll body 45. A spring receiver 46c attached to the shaft 44, and a spring 46d provided between the roll body 45 and the spring receiver 46c for urging the roll body 45 toward the center of the shaft 44, and by ball spline fitting. The roll body 45 can be rotated integrally with the shaft 44 and the roll body 45 can be slid in the axial direction with respect to the shaft 44. As a result, the coil material C can slide in the width direction (the axial direction of the roll main body 45) even when being held and fed by the roll feeder 40. Further, when the holding of the coil material C by the roll feeder 40 is released, the roll body 45 returns to the initial position (center position in the figure) by the biasing force of the spring 46d.

  As shown in FIG. 1, the shear 60 is configured as a crank-type shear that cuts by a down-cut method, and faces the upper blade 62 a and a shear body 64 that is attached with an upper blade 62 a and stands by at the upper end in the initial state. The lower blade 62b is installed, and the coil material C is sheared by the upper blade 62a and the lower blade 62b by lowering the shear body 64 along the frame 60a by driving a motor and a crank mechanism (not shown). This motor is rotationally driven by the drive signal from the main controller 100 so that the shear body 64 performs a reciprocating up and down operation. The cut sheet S is unloaded by a unloading roll 25 that is provided on the downstream side of the shear 60 and is driven by a motor (not shown) and moves on the free roller 26 attached to the unloading table 24 by its own weight. It stops by coming into contact with the carry-out stopper 27 provided at the tip.

  As shown in FIG. 2, the upstream guide 70 is disposed on the guide frame 22 on the upstream side of the cutting blade 62 of the crank shear 60 (the lower blade 62b is shown in the figure), and the coil material C is opposed from both sides. A pair of guides 72 and 73 (hereinafter referred to as “guide A”) and a pair of guides 74 and 75 (hereinafter referred to as “guide B”) arranged in pairs so as to be sandwiched therebetween. With a guide. Here, the interval between the guide A and the guide B is set such that the side surface of the coil material C can be guided substantially vertically with respect to the cutting blade 62 even when the coil material C is bent in the width direction. . Guides 72 to 75 of guides A and B are air cylinders 72a to 75a as actuators, and rollers 72b to 75b that are rotatably attached to the tips of rods of the air cylinders 72a to 75a via a roller frame (not shown). The guides 72 and 74 arranged on the right side (lower side in the figure) with respect to the feeding direction of the coil material C include positioning stoppers 72c and 74c and positioning stoppers from the rods of the air cylinders 72a and 74a. Projections 72d and 74d projecting in the direction in which 72c and 74c are installed are further provided. In addition, about the component of a guide, the code | symbol was attached | subjected only to the guide 72 in the figure. The guides A and B configured in this manner are slid in a direction in contact with the coil material C by the drive signal from the main controller 100 to the air cylinders 72a to 75a to guide the coil material C, or the coil material C Or the guide of the coil material C is released. When guiding the coil material C, the guides 72 and 74 stop at the positions where the projecting portions 72d and 74d abut against the positioning stoppers 72c and 74c, and the guides 73 and 75 have the rollers 73b and 75b abutting against the coil material C. Stop at the point of contact. At this time, as described above, the roll feeder 40 includes the floating mechanisms 46 and 56 and can slide in the width direction even when the coil material C is being fed, so that the side surface of the coil material C approaches the feeding direction. Can be guided to.

  As shown in FIG. 2, the downstream guide 80 is disposed on the guide frame 22 on the downstream side of the cutting blade 62 of the crank shear 60 and is disposed in pairs so as to sandwich the coil material C from both side surfaces. A pair of guides 82 and 83 (hereinafter referred to as “guide C”) and a pair of guides 84 and 85 (hereinafter referred to as “guide D”). Since the configurations and operations of the guides C and D are substantially the same as those of the guides A and B, the description thereof is omitted, and only the guide 84 is denoted by a reference numeral for the components of the guide. Here, as shown in FIG. 4, the guide 82 of the guide C includes a linear encoder 88 and can detect the position of the roller 82 b of the guide 82. This point will be described below. In addition to the above-described configuration, the guide 82 includes a roller frame 82e to which the roller 82b is rotatably attached, and a spring having one end fixed to the protrusion 82g of the roller frame 82e and the other end fixed to the protrusion 82h of the protrusion 82d. 82f. Here, as shown in the figure, the guide point where the guide 72 stops by the stopper 72c and the roller 72b contacts the coil material C, and the guide point where the guide 84 stops by the stopper 84c and the roller 84b contacts the coil material C. A straight line parallel to the feed direction connecting the two is defined as a reference line. The roller frame 82e is disposed on a linear guide (not shown) so that it can smoothly move in a direction (vertical direction in the figure) substantially perpendicular to the reference line. Further, the spring 82f is set to a natural length Ls such that the tip of the roller 82b is inward of the reference line (upper side in the drawing) in the initial state (the state in FIG. 4). A photo detector 88a for optically reading the scale of the linear scale 88b stretched on the guide frame 22 along the moving direction is attached to the roller frame 82e. The photodetector 88 a and the linear scale 88 b constitute a linear encoder 88, and the photodetector 88 a outputs a position signal P obtained by optically reading the scale of the linear scale 88 b to the main controller 100. Based on this position signal P, the main controller 100 detects where the roller 82b is located in the movement direction. The position signal P when the tip of the roller 82b is on the reference line is stored in the ROM 104 in advance as the reference position P0. A case where the coil material C is guided by the guide 82 will be described. FIG. 5 is an explanatory view showing a state in which the coil material C is guided by the guides C and D. FIG. As shown in the drawing, the guide 82 stops at a position where the protruding portion 82d contacts the stopper 82c and contacts the coil material C on the reference line. At this time, the spring 82f is set to have a minimum length Lsmin that is maximally contracted so that the roller 82b is not pushed outward even if the coil material C is bent. Further, since the maximum urging force is generated because it is contracted to the maximum, the spring constant is set so as not to generate the urging force enough to push the coil material C. For this reason, the guide 82 does not push the coil material C inward (upward in the drawing) from the reference line and is not pushed outward (lower in the drawing) by the coil material C. Can function.

  As shown in FIG. 1, the operation panel 90 includes a power button switch 91 for turning on / off the power, a start button switch 92 for instructing the start of cutting during the automatic mode for automatically operating the cutting device 20, and the cutting end during the automatic mode. A stop button switch 93 for instructing, various setting switches 94 for performing various settings for cutting, a mode selection switch 95 for switching whether the cutting device 20 is set to an automatic mode or a manual mode that can be manually operated by an operator, There are various operation button switches for manual mode, etc., and an operator's instruction can be input to the main controller 100 via the internal communication interface 108.

  The main controller 100 is configured as a microprocessor centered on the CPU 102. The ROM 104 stores various processing programs, the reference position P0 of the roller 82b, the RAM 106 that temporarily stores various data, the operation panel 90, and the like. And an internal communication interface 108 that can communicate with each other, and these are connected so that signals can be exchanged with each other. The main controller 100 inputs an operation signal generated in response to an operation on the operation panel 90 and a position signal P from the photodetector 88b. Further, a drive signal corresponding to the feed amount of the coil material C is output to the stepping motor 59 of the roll feeder 40, a drive signal is output to the shear 60, and a drive signal is output to the unloading roll 25. Moreover, a drive signal is output to the air cylinder 41 of the roll feeder 40 to move the upper roll 43 up and down, or a drive signal is output to the air cylinders 72a to 75a and the air cylinders 82a to 85a of the guides A to D. The coil material C is guided and the guide is released. It is assumed that when a drive signal is output to the stepping motor 59 of the roll feeder 40, the drive signal is also output to the stepping motor of the uncoiler 30 so as to perform the necessary rotation accompanying the feeding of the coil material C.

  Next, operation | movement of the cutting device 20 of this embodiment comprised in this way is demonstrated. FIG. 6 is a flowchart illustrating an example of an automatic cutting processing routine executed by the main controller 100. This process is executed when the coil material C is set, the mode select switch 95 is set to the automatic mode, and the start button switch 92 is pressed. Normally, when the coil material C is set, the setup operation in the manual mode is performed (for example, the leading end portion of the coil material C which cannot be used with a tight curl is used), so the start button switch 92 is pressed. The tip of the coil material C is at a position on the lower blade 62b.

  When the automatic cutting processing routine is executed, the CPU 102 of the main controller 100 first drives and controls the air cylinder 41 so that the upper roll 43 of the roll feeder 40 descends, and the coil material C is clamped by the roll feeder 40 ( Step S100). Next, the air cylinders 72a to 75a and air cylinders 82a to 85a of the guides A to D are driven and controlled to release the guides of the guides B and C and guide the coil material C with the guides A and D (step S110). Then, the roll feeder 40 is driven and controlled, and the coil material C is fed by the feed amount L1 (step S120). Here, the feed amount L1 is determined as a feed amount when cutting the coil material C by a predetermined length (for example, 300 mm). When the coil material C is sent, the position signal P from the photo detector 88b is input (step S130), and the difference (P-P0) between the input position signal P and the reference position P0 stored in the ROM 104 is a deviation amount ΔP. (Step S140). Here, the deviation amount ΔP will be described.

  Since this deviation amount ΔP is related to the bending of the coil material C in the width direction, this bending will be described first. When the coil material C is manufactured, a steel piece as a material is rolled to a predetermined thickness and wound into a roll shape. However, when rolled, the coil material C may be accompanied by a bow-like bending in the width direction. In that case, since the bending once generated is not completely eliminated, the coil material C is sent with the bending in the width direction. FIGS. 7 and 8 show how the coil material C having such a bend is fed. FIG. 7 shows a state in which the coil material C is bent to the right with respect to the feeding direction, and FIG. 8 shows a state in which the coil material C is bent to the left with respect to the feeding direction. In either case, the position of the side surface of the coil material C is shifted from the reference line by the amount of the bending, and the roller 82b of the guide 82 is in contact with the side surface of the shifted coil material C. For this reason, the position signal P which is the position of the roller 82b is the position of the side surface of the coil material C. Further, the relative position of the roller 82b with respect to the reference line, that is, the shift amount ΔP, which is the difference between the position signal P and the reference position P0, is a bend with respect to the reference line of the coil material C. Therefore, by calculating the shift amount ΔP, The bending of the material C in the width direction can be determined. At this time, the bending in the width direction of the sheet material becomes larger with respect to the reference line at the position of the guide 82 arranged at a substantially central position between the guide points, so that the bending can be accurately determined. Assuming that the value of the position signal P of the roller 82b becomes smaller as the roller 82b goes upward in the figure, in FIG. 7, the value of the shift amount ΔP becomes smaller on the negative side as the bending of the coil material C becomes larger. In FIG. 8, the value of the shift amount ΔP increases to the positive side as the bending of the coil material C increases. That is, it can be determined that the bending of the coil material C in the width direction increases as the absolute value of the shift amount ΔP increases.

  Then, it is determined whether or not the absolute value of the deviation amount ΔP is equal to or less than the threshold value ΔPref (step S150). In order to describe the threshold value ΔPref, a problem caused by the bending of the coil material C in the width direction will be described. Here, the belt type CVT ring is manufactured by cutting a sheet S of a predetermined length, bending it into a cylindrical shape, joining both cut surfaces by welding, and further cutting into a ring shape. It is carried out by enlarging the diameter of the ring by rolling with a so-called ring rolling machine. Therefore, when the shape of the cut sheet S is defective, troubles such as deterioration in workability at the time of welding or a decrease in the dimensional accuracy at the time of rolling due to a constant diameter when the ring is cut. In order to prevent such trouble, the parallelism between the cut surfaces of the cut sheet S and the perpendicularity between the cut surfaces and the side surfaces are strictly required, and the shape of the cut sheet S becomes defective due to bending. When the sheet is cut, the entire cut sheet S is discarded and the yield is greatly deteriorated. Therefore, in the cutting apparatus 20 of the present embodiment, in order to prevent such a problem, an allowable range of bending in the width direction of the coil material C so that the cut sheet S does not become defective, that is, a deviation amount ΔP. The magnitude of the absolute value is obtained in advance by experiments or the like and stored in the ROM 104 as the threshold value ΔPref. When the value is equal to or smaller than the threshold value ΔPref, it is determined that the bending is within the allowable range, and normal cutting processing is performed. It is judged that the bending exceeds the allowable range, and the cutting process is performed so as to avoid the influence of the bending. If it is determined in step S150 that the deviation amount ΔP is equal to or smaller than the threshold value ΔPref, a normal cutting process is performed (step S200), and the processes after step S100 are repeated. This process is repeated until the stop button switch 93 is pressed by the operator. Here, the description of the automatic cutting process routine is interrupted, and the normal cutting process will be described.

  The normal cutting process is performed by a normal cutting process routine illustrated in FIG. In the normal cutting process routine, first, the shear 60 is driven and controlled to cut the coil material C (step S210). Subsequently, the air cylinder 41 of the roll feeder 40 is driven and controlled to release the coil material C (step S220). The clamping of the coil material C is released when the roll body 45, 55 in the axial direction of the roll feeder 40 has reached the limit position due to the bending of the coil material C in the width direction or the like. This is because it is impossible to return to the initial position. Then, the guide D is released (step S230), the carry-out roll 25 is driven and the cut sheet S is carried out to the carry-out table 24 (step S240), and this routine is finished. FIG. 10 shows how the coil material C is cut by this normal cutting process. 10A shows a state before cutting, FIG. 10B shows a state in which the coil material C is cut and the sheet S is cut out, and FIG. 10C shows a state in which the sheet S is carried out to the carry-out table 24. .

  Returning to the automatic cutting process routine of FIG. 6, when it is determined in step S150 that the deviation amount ΔP is not less than or equal to the threshold value ΔPref, the correction cutting process is performed (step S300), and then the discarding process is performed (step S400). Here, the description of the automatic cutting process routine is interrupted, and the correction cutting process and the discarding process will be described in order.

  First, the correction cutting process will be described. This process is performed by the correction cutting process routine illustrated in FIG. In the correction cutting processing routine, first, the guide of the guide A is released and the coil material C is guided by the guides C and D (step S310), so that the direction of the side surface of the coil material C approaches the feeding direction. Correct posture. In addition, since the roll main bodies 45 and 55 of the roll feeder 40 slide in the axial direction, the posture of the coil material C can be corrected smoothly. Next, the coil material C is cut (step S320), and the clamping of the coil material C of the roll feeder 40 is released (step S330). The reason for releasing the holding of the coil material C is the same reason as described above. Then, the guides C and D are released (step S340), the cut sheet S is carried out to the carry-out table 24 (step S350), and this routine is finished. FIG. 12 shows a state in which the coil material C is cut by this correction cutting process. FIG. 12A shows a state before the posture of the coil material C is corrected, and FIG. 12B shows a state after the posture of the coil material C is corrected. In FIG. 12A, if the coil material C is bent, the end surface of the coil material C is greatly displaced from the cutting blade 62. If the cutting is performed in this state, the parallelism of both cut surfaces of the cut sheet S is as follows. It is greatly deteriorated and the shape becomes defective. However, in this embodiment, since the guide A is released and the coil material C is guided by the guide C in this state, the direction of the side surface of the coil material C is brought closer to the feeding direction as shown in FIG. The deviation of the end face is also reduced, and the parallelism between the end face and the cutting blade 62 is improved. And since it cuts along the cutting line shown by the dotted line in the figure, the cut surface and side surface of the cut sheet S are not completely perpendicular, but have a certain degree of squareness, and both cut surfaces are also completely parallel. However, the cut sheet S is less likely to have a defective shape.

  Next, the discard process will be described. This process is performed by a discarding process routine illustrated in FIG. In the discard processing routine, first, the coil material C is clamped by the roll feeder 40 (step S410), the coil material C is guided by the guides A and B (step S420), and the direction of the side surface of the coil material C is the feeding direction. The posture of the coil material C is corrected so as to approach the position. In addition, since the roll main bodies 45 and 55 of the roll feeder 40 slide in the axial direction, the posture of the coil material C can be corrected smoothly. Next, the roll feeder 40 is driven and controlled, and the coil material C is fed by the feed amount L2 (step S430). Here, the feed amount L2 is determined as a feed amount necessary for the “discard cut” in which the end portion of the coil material C is cut off with a predetermined cut length, and specifically, a predetermined length (for example, 300 mm). ) Is set to about 1/100 of the feed amount L1 when cutting. Subsequently, the shear 60 is driven and controlled to be discarded (step S440), the clamping of the coil material C of the roll feeder 40 is released (step S450), and this routine is finished. FIG. 14 shows a state in which the end portion of the coil material C is discarded by this discarding process. FIG. 14A shows a state after the sheet S cut by the correction cutting process is carried out, and FIG. 14B shows a state where the coil material C is fed by the feed amount L2 while being guided by the guides A and B. Show. As shown in FIG. 14 (a), the end face of the coil material C is parallel to the cutting blade 62, but the angle A0 between the end face and the side face is not straight because the side face is greatly displaced from the feed direction by bending. The angle is lost. In this state, if the sheet is simply fed at the feed amount L1 and cut, it is cut into a substantially parallelogram shape, resulting in a defective shape. In this embodiment, the coil material C is fed by the feed amount L2 while being guided by the guides A and B ( The posture of the coil material C can be corrected and the direction of the side surface can be brought closer to the feeding direction. On the other hand, the end face of the coil material C is displaced and not parallel to the cutting blade 62, but is discarded in this state. Therefore, the end (the hatched portion in the figure) is discarded, and a new end face after being discarded. Is parallel to the cutting blade 62, and the angle A1 made with the side surface is also corrected, so that the perpendicularity is not impaired although it is not a complete right angle. Here, the thrown-off feed amount L2 is as small as about 1/100 of the feed amount L1, but is greatly illustrated for convenience of explanation. Note that the discarded cut material is released to the outside of the machine through a crop shooter (not shown) provided near the lower blade 62b at the same time as cutting.

  Returning to the automatic cutting process routine of FIG. 6, the processes after step S100 are repeated. This process is repeated until the stop button switch 93 is pressed by the operator. At this time, the end face and the side face of the coil material C can maintain a certain degree of squareness by discarding, and the cut cut at the tip of the sheet S cut when the feed amount L1 is again fed and cut. Since the surface (the end surface of the discarded coil material C) and the cut surface that is cut later are substantially parallel to each other, the occurrence of shape defects is reduced. Since the discard cut length is as small as about 1/100 of the cut time as described above, the number of sheets S that can be taken out from one coil material C is not greatly reduced. As described above, the deviation amount ΔP between the reference line and the side surface of the coil material C is calculated from the roller 82b of the guide 82 as the bending in the width direction of the coil material C. When the deviation amount ΔP is equal to or less than the threshold value ΔPref, the correction cutting process or the discarding is performed. The sheet S can be cut into a good shape by a normal cutting process without performing an unnecessary process such as a cutting process. When the deviation amount ΔP exceeds the threshold value ΔPref, the sheet is cut by performing a correction cutting process and a discard cutting process. It is possible to prevent the formed sheet S from having a defective shape.

  According to the cutting device 20 of the embodiment described above, the guides 72 and 84 of the guides A and D abut on the side surface of the coil material C at two guide points, and the reference line connecting the two guide points The position of the guide roller 82b, which is arranged so as to be movable in a substantially orthogonal direction, abuts against the side surface of the coil material C and follows the bending of the coil material C, is detected by the position signal P from the linear encoder 88. A difference (P−P0) from the reference position P0 when the guide roller 82b is positioned on the reference line is calculated as a deviation amount ΔP, and the bending of the coil material C in the width direction is calculated based on the absolute value of the calculated deviation amount ΔP. Determine. As a result, the bending in the width direction of the coil material C can be accurately determined with a simple configuration. When the detected deviation amount ΔP exceeds a predetermined threshold value ΔPref, the cut surface and the side surface of the cut sheet S are cut while maintaining a certain degree of squareness by the correction cutting process or the discarding process. As a result, even if the determined bending is large, the coil material C can be cut without causing the cut sheet S to have a defective shape.

  In the cutting apparatus 20 of the embodiment, the shift amount ΔP is detected at a substantially central position between the guide points. However, the present invention is not limited to this, and any position may be detected as long as the shift amount ΔP can be detected. Moreover, it is good also as what provides separately the thing which detects deviation | shift amount (DELTA) P, without serving as a guide.

  In the cutting device 20 of the embodiment, a roller is used as a guide for the coil material C, but the guide is not limited to the roller and may be guided by a flat plate or the like.

  In the cutting apparatus 20 according to the embodiment, when the deviation amount ΔP exceeds the threshold value ΔPref in step S150, the correction cutting process and the discarding process are performed, and then the process returns to the process of step S100 again. However, the present invention is not limited thereto. Once the threshold value ΔPref is exceeded, the corrective cutting process and the discarding process may be repeated, or after a plurality of correction cutting processes and the discarding process, the process returns to step S100. Also good.

  In the cutting apparatus 20 of the embodiment, the correction cutting process and the discard cutting process are performed when the deviation amount ΔP exceeds the threshold value ΔPref. However, the present invention is not limited to this, and only the correction cutting process may be performed. Moreover, it is good also as what issues a warning for notifying an operator of abnormality, without performing such a process.

  In the cutting apparatus 20 of the embodiment, the metal material used for the belt of the belt type CVT is cut. However, the present invention is not limited to this, and any metal material wound in a roll shape may be cut.

  In the embodiment, the cutting apparatus 20 has been described as a form. However, the form is not limited to this, and the form may be a sheet bending determination apparatus.

  Here, the relationship between the component of this embodiment and the component of this invention is clarified. The guide roller 82b of the guide 82 of the present embodiment corresponds to the “following means” of the present invention, and the linear encoder 88 that detects the position of the guide roller 82b and the processing of steps S130 to S140 of the automatic cutting processing routine of FIG. The main controller 100 that performs the processing corresponds to “relative position detection means”, and the main controller 100 that executes the process of step S150 of the automatic cutting processing routine in FIG. 6 corresponds to “bend determination means”. The roll feeder 40 corresponds to “feeding means”, the shear 60 corresponds to “cutting means”, and the guide A and the guide D among the upstream guide 70 and the downstream guide 80 correspond to “guide means”. The guide C of the downstream guide 80 corresponds to “downstream posture correcting means”, and the main controller 100 that executes the processes of steps S100 to S120 and S200 to S400 of the automatic cutting processing routine of FIG. It corresponds to. Furthermore, the guide B of the upstream guide 70 corresponds to the upstream posture correction means. In the present embodiment, by explaining the operation of the cutting device 20, an example of the sheet bending determination device and the sheet bending determination method of the present invention is also clarified. The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the same as that of the embodiment described in the column of means for solving the problem. It is an example for specifically explaining the best mode for doing so, and does not limit the elements of the invention described in the column of means for solving the problem. That is, the interpretation of the invention described in the column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific example.

  The best mode for carrying out the present invention has been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the gist of the present invention. Of course, it can be implemented in the form.

  The present invention can be used in the belt type CVT manufacturing industry, the coil metal processing industry, and the like.

It is a block diagram which shows the outline of a structure of the cutting device 20 carrying the bending determination apparatus as one Example of this invention. 3 is a top view of the cutting device 20. FIG. It is sectional drawing which shows the AA cross section of the roll feeder 40 of FIG. FIG. 6 is a configuration diagram showing an outline of the configuration of a guide 82. It is explanatory drawing which shows a mode that the coil material C is guided with the guides C and D. FIG. It is a flowchart which shows an example of an automatic cutting process routine. It is explanatory drawing which shows a mode that the coil material C is turning right with respect to a feed direction. It is explanatory drawing which shows a mode that the coil material C is turning left with respect to a feed direction. It is a flowchart which shows an example of a normal cutting process routine. It is explanatory drawing which shows a mode that the coil material C is cut | disconnected by a normal cutting process. It is a flowchart which shows an example of the correction | amendment cutting process routine. It is explanatory drawing which shows a mode that the coil material C is cut | disconnected by the correction | amendment cutting process. It is a flowchart which shows an example of a discard process routine. It is explanatory drawing which shows a mode that the coil material C is discarded by the discard process.

Explanation of symbols

  20 cutting device, 22 guide frame, 24 carry-out stand, 25 carry-out roll, 26 free roller, 27 carry-out stopper, 30 uncoiler, 32 mandrel, 34 presser roll, 36 loop guide, 40 roll feeder, 40a frame, 41 air cylinder, 42 Roll frame, 42a Support shaft, 43 Upper roll, 44 Shaft, 45 Roll body, 46 Floating mechanism, 46a Ball, 46b Cylindrical member, 46c Spring receiver, 46d Spring, 48 Sprocket, 53 Lower roll, 54 Shaft, 55 Roll body, 56 floating mechanism, 56a ball, 56b cylindrical member, 56c spring receiver, 56d spring, 58 sprocket, 59 stepping motor, 59a coupling, 60 shear 60a frame, 62 cutting blade, 62a upper blade, 62b lower blade, 64 shear body, 70 upstream guide, 72, 73, 74, 75 guide, 72a, 73a, 74a, 75a air cylinder, 72b, 73b, 74b, 75b Roller, 72c, 74c stopper, 72d, 74d protrusion, 80 downstream guide, 82, 83, 84, 85 guide, 82a, 83a, 84a, 85a air cylinder, 82b, 83b, 84b, 85b roller, 82c, 84c stopper , 82d, 84d Projection, 82e Roller frame, 82f Spring, 82g, 82h Projection, 88 Linear encoder, 88a Photo detector, 88b Linear scale, 90 Operation panel, 91 Power button switch, 92 Start button switch, 93 Stop Button switch, 94 various setting switches, 95 mode select switch, 100 main controller, 102 CPU, 104 ROM, 106 RAM, 108 interface.

Claims (10)

A feeding means for feeding a metal sheet material wound in a roll shape, a cutting means for cutting the sheet material fed at a predetermined length by the feeding means, and a plurality of locations on both side surfaces of the sheet material. A sheet bending determination device that is mounted on a cutting device that includes a guide unit that guides in a feeding direction by sandwiching the side surface of the sheet material from both sides by contact , and determines a bending in the width direction of the sheet material,
The plurality of locations include two guide points defined at a predetermined interval from the upstream side of the cutting means to the downstream side of the cutting means on one side of the sheet material,
It is arranged at a position between the two guide points so as to be movable in a direction substantially perpendicular to a reference line connecting the guide points, and is in contact with the side surface of the sheet material at the position and in the width direction of the sheet material Following means for following the displacement;
A relative position detecting means for detecting a relative position of the tracking means with respect to the reference line;
A sheet bending determination device comprising: a bending determination unit that determines a bending in the width direction of the sheet material based on the detected relative position of the following unit.   The sheet bending determination device according to claim 1, wherein the following unit is a unit disposed at a substantially central position between the two guide points.   The follow-up means includes an abutting portion that abuts against a side surface of the sheet material, and an urging means that urges the corresponding contact portion toward the side surface of the sheet material, and the sheet material is fed by the feeding unit. The sheet bending determination apparatus according to claim 1 or 2, wherein the abutting portion is urged by the urging means so as to protrude inward from the reference line in a previous initial state.   The guide means includes an abutting portion that abuts against a side surface of the sheet material, a pressing means that presses the corresponding contact portion in a direction substantially perpendicular to the feeding direction of the sheet material, and the abutting that is pressed by the pressing means. The sheet bending determination apparatus according to any one of claims 1 to 3, wherein the sheet bending determination apparatus includes a stopper that is positioned so that the portion stops at the guide point.   The sheet bending determination device according to claim 3 or 4, wherein the contact portion of the following means and the guide means is a rotatable roller.   The sheet bending determination device according to any one of claims 1 to 5, wherein the sheet material is used for manufacturing a ring of a belt-type CVT in which a belt includes an element and a ring. A cutting device for cutting a metal sheet material wound in a roll,
Feeding means for feeding the sheet material;
Cutting means for cutting the sheet material sent at predetermined lengths by the feeding means;
An upstream guide that is disposed upstream of the cutting means and abuts on both sides of the sheet material at a plurality of locations to guide the side of the sheet material from both sides, and is disposed downstream of the cutting means A guide means comprising a downstream guide that guides the side surface of the sheet material by sandwiching the side surface of the sheet material from both sides by making contact with both side surfaces of the sheet material;
A downstream posture correcting means that is arranged downstream of the cutting means and corrects the posture of the sheet material so that the orientation of the side surface of the sheet material on the downstream side approaches the feeding direction;
A sheet bending determination device according to any one of claims 1 to 6,
When the sheet bending determination device determines that the bending in the width direction of the sheet material is within an allowable range, the sheet material is fed with a feed amount corresponding to the predetermined length with a guide by the guide means. When normal cutting control for controlling the cutting means to control the feeding means and to cut the fed sheet material is performed, and when the bending in the width direction of the sheet material exceeds an allowable range by the sheet bending determination device When it is determined, the feeding is performed so that the sheet material is fed with a feed amount corresponding to the predetermined length with the guide by the downstream guide of the guide means and the posture correction by the downstream posture correcting means. Control means for controlling the cutting means and controlling the cutting means so as to cut the fed sheet material ,
Equipped with a,
The plurality of locations where the upstream guide contacts the sheet material includes one upstream guide point defined on one side surface of the sheet material, and the downstream guide contacts the sheet material. The cutting device in which the plurality of contact points include one downstream guide point defined at a predetermined distance from the upstream guide point on the one side surface side of the sheet material .   The downstream posture correcting means is disposed in pairs so as to correct the posture by sandwiching the side surface of the sheet material from both sides between the cutting means and the downstream guide. 8. The cutting apparatus according to claim 7, wherein one of them also serves as the following means. The cutting device according to claim 7 or 8,
An upstream posture correcting means that is arranged upstream of the cutting means and corrects the posture of the sheet material so that the orientation of the side surface of the sheet material on the upstream side approaches the feeding direction;
The control means, after executing the correction cutting control, with the guide by the upstream guide among the guide means, and with the correction of the posture by the upstream posture correction means, the truncation length to cut off the end of the sheet material A cutting apparatus that controls the feeding unit so that the sheet material is fed with a feeding amount corresponding to the length of the sheet material, and executes a discarding control for controlling the cutting unit so that the fed sheet material is cut. A feeding means for feeding a metal sheet material wound in a roll shape, a cutting means for cutting the sheet material fed at a predetermined length by the feeding means, and a plurality of locations on both side surfaces of the sheet material. A sheet bending determination method for determining a bending in the width direction of the sheet material in a cutting apparatus provided with a guide unit that guides in a feeding direction by sandwiching a side surface of the sheet material from both sides by contacting the sheet material,
The plurality of locations include two guide points defined at a predetermined interval from the upstream side of the cutting means to the downstream side of the cutting means on one side of the sheet material,
(A) The sheet material is disposed at a position between the two guide points so as to be movable in a direction substantially orthogonal to a reference line connecting the guide points, and is in contact with the side surface of the sheet material at the position and the width of the sheet material Detecting a relative position of the tracking means with respect to the reference line using tracking means that follows a displacement in a direction;
(B) A sheet bending determination method including a step of determining a bending in the width direction of the sheet material based on the position detected in the step (a).

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